The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 24, 2007
Filed:
Jul. 01, 2002
Applicants:
Hidetoshi Fukuo, Osaka, JP;
Naoshi Murata, Osaka, JP;
Makoto Hirotani, Osaka, JP;
Tomohiro Sawa, Osaka, JP;
Inventors:
Hidetoshi Fukuo, Osaka, JP;
Naoshi Murata, Osaka, JP;
Makoto Hirotani, Osaka, JP;
Tomohiro Sawa, Osaka, JP;
Assignee:
Sakura Color Products Corporation, Osaka-shi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09D 11/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
A central core type marking pen which has an ink storage portion of a central core and a pen tip connected thereto, wherein the central core contains a water-based pigment-containing ink composition which contains a thickening agent and exhibits, at 20° C., a viscosity of not less than 45 mPa·s and not greater than 12 mPa·s when a stress of 0.01 and a stress of 10 Pa are applied, respectively.